Interesting SLS problem. Yes I've searched ;)

[Micah247]

I have a 06 E53 4.4 with Bav auto lowering kit, OEM hitch. Love it. Recently I've noticed every time I connect a trailer (I have 2) I get the Self Leveling Sus Inactive. When I unplug it goes away. I've towed jet skis 2,100 miles and got the error once then it went away. I've towed cars with a Uhaul dolly, short distances with no issues. Now every time I plug in a Jetski trailer I get the error. There is not loss in ride height or performance, just the error message. Any ideas?

Ps. I had a blinker go out on one trailer due to a poor ground, but the other trailer if mint, but still gives error.